This trophy is awarded for taking down ten vehicles (either police chasing you or other enemies).
You can get vehicle take downs using traffic lights or other hackable environmental barriers (some of these require skill points to unlock). Simply start a chase, drive through areas with traffic lights etc. and when a takedown is available the hack prompt will pop up on screen flashing blue and with a distinctive sound. The prompt is generally at the bottom of the screen since the chasing vehicle will normally be behind you.
Hit square when you get the prompt and bam. Sometimes (but not always) you'll be treated to a slow-mo replay.
Repeat x10 and voila. You may well get this naturally through playing the story but if not just start police chases in open play, or some of the Fixer missions will also involve chases.